RTF malware analysis — malicious · b8c23fc2eb5d394b

MALICIOUS

RTF

9.2 KB First seen: 2018-04-12

MD5: fb7452edcd528b6d8855bc7571770cff SHA-1: d26ea1215ee06a24742885d53ead2f7613541791 SHA-256: b8c23fc2eb5d394b027061543ff698ac34a71b8bba65ea52b00fd66cf1e8d54c

220 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The RTF file contains embedded OLE object data and triggers heuristics related to Equation Editor exploits, specifically CVE-2017-11882. This indicates the file is designed to exploit this vulnerability for client-side code execution. No document body text or scripts were extracted, but the critical heuristics strongly suggest the exploit's intent.

Heuristics 5

Ole10Native stream in RTF OLE object high CVE related RTF_OLE10NATIVE_STREAM

RTF contains an embedded OLE object with an Ole10Native stream. This is a strong payload-container signal and is related to Word/OLE exploit delivery, but it is not specific enough on its own to assign a CVE.
ClamAV: Rtf.Exploit.CVE_2017_11882-6584355-1 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Rtf.Exploit.CVE_2017_11882-6584355-1
Equation Editor CLSID critical RTF_EQUATION_EDITOR

Equation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
\objupdate forces OLE activation high RTF_OBJUPDATE

RTF contains \objupdate — forces automatic OLE object instantiation when the document is opened, bypassing user interaction. Almost exclusively seen in Equation Editor exploit documents.
OLE object data medium RTF_OBJDATA

RTF contains 1 \objdata section(s) — embedded OLE objects

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off0000003b.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x3B	4667 bytes
SHA-256: `dea945c451b06888830ed421abc86fa98953c34b44a95f63d0d8f2640c64bf33`

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